Bump rxjs from 6.5.3 to 6.5.4 (#4730)

Bumps [rxjs](https://github.com/reactivex/rxjs) from 6.5.3 to 6.5.4.
- [Release notes](https://github.com/reactivex/rxjs/releases)
- [Changelog](https://github.com/ReactiveX/rxjs/blob/6.5.4/CHANGELOG.md)
- [Commits](https://github.com/reactivex/rxjs/compare/6.5.3...6.5.4)
Signed-off-by: Ndependabot-preview[bot] <support@dependabot.com>

package-lock.json

@@ -20004,9 +20004,9 @@
       "dev": true
     },
     "rxjs": {
-      "version": "6.5.3",
-      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.3.tgz",
-      "integrity": "sha512-wuYsAYYFdWTAnAaPoKGNhfpWwKZbJW+HgAJ+mImp+Epl7BG8oNWBCTyRM8gba9k4lk8BgWdoYm21Mo/RYhhbgA==",
+      "version": "6.5.4",
+      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.4.tgz",
+      "integrity": "sha512-naMQXcgEo3csAEGvw/NydRA0fuS2nDZJiw1YUWFKU7aPPAPGZEsD4Iimit96qwCieH6y614MCLYwdkrWx7z/7Q==",
       "requires": {
         "tslib": "^1.9.0"
       }

package.json

@@ -124,7 +124,7 @@
     "ngx-filter-pipe": "2.1.2",
     "normalize.css": "8.0.1",
     "roboto-fontface": "0.10.0",
-    "rxjs": "6.5.3",
+    "rxjs": "6.5.4",
     "rxjs-compat": "6.5.3",
     "sockjs-client": "1.4.0",
     "systemjs": "6.1.7",